Moral distress in rural veterinarians as an outcome of the <i>Mycoplasma bovis</i> incursion in southern New Zealand

To gain insight into the world of rural veterinarians during the Mycoplasma bovis incursion within southern Aotearoa New Zealand by exploring their experiences during the incursion, and to understand the consequences, positive and negative, of these experiences. A qualitative social science research methodology, guided by the philosophical paradigm of pragmatism was used to collect data from an information-rich sample (n = 6) of rural veterinarians from Otago and Southland. Interview and focus group techniques were used, both guided by a semi-structured interview guide. Veterinarians were asked a range of questions, including their role within the incursion; whether their involvement had any positive or negative impact for them; and their experience of conflicting demands. Analysis of the narrative data collected was guided by Braun and Clarke’s approach to reflexive thematic analysis. All six participants approached agreed to participate. Analysis of the data provided an understanding of the trauma they experienced during the incursion. An overarching theme of psychological distress was underpinned by four sub-themes, with epistemic injustice and bearing witness the two sub-themes reported to be associated with the greatest experience of psychological distress. These, along with the other two identified stressors, led to the experience of moral distress, with moral residue and moral injury also experienced by some participants. Eradication programmes for exotic diseases in production animals inevitably have an impact on rural veterinarians, in their role working closely with farmers. Potentially, these impacts could be positive, recognising and utilising veterinarians’ experience, skills and knowledge base. This study, however, illustrates the significant negative impacts for some rural veterinarians exposed to the recent M. bovis eradication programme in New Zealand, including experiences of moral distress and moral injury. Consequently, this eradication programme resulted in increased stress for study participants. There is a need to consider how the system addresses future exotic disease incursions to better incorporate and utilise the knowledge and skills of the expert workforce of rural veterinarians and to minimise the negative impacts on them. To date, the experience of moral distress by rural veterinarians during exotic disease incursions has been underreported globally and unexplored in New Zealand. The findings from this study contribute further insights to the existing limited literature and provide guidance on how to reduce the adverse experiences on rural veterinarians during future incursions.</p

The 2014 TeV γ-Ray Flare of Mrk 501 Seen with H.E.S.S.: Temporal and Spectral Constraints on Lorentz Invariance Violation

The blazar Mrk 501 (z = 0.034) was observed at very-high-energy (VHE, E ≳ 100 GeV) gamma-ray wavelengths during a bright flare on the night of 2014 June 23-24 (MJD 56832) with the H.E.S.S. phase-II array of Cherenkov telescopes. Data taken that night by H.E.S.S. at large zenith angle reveal an exceptional number of gamma-ray photons at multi-TeV energies, with rapid flux variability and an energy coverage extending significantly up to 20 TeV. This data set is used to constrain Lorentz invariance violation (LIV) using two independent channels: a temporal approach considers the possibility of an energy dependence in the arrival time of gamma-rays, whereas a spectral approach considers the possibility of modifications to the interaction of VHE gamma-rays with extragalactic background light (EBL) photons. The non-detection of energy-dependent time delays and the non-observation of deviations between the measured spectrum and that of a supposed power-law intrinsic spectrum with standard EBL attenuation are used independently to derive strong constraints on the energy scale of LIV (E QG) in the subluminal scenario for linear and quadratic perturbations in the dispersion relation of photons. For the case of linear perturbations, the 95% confidence level limits obtained are E QG,1 > 3.6 ×1017 GeV using the temporal approach and E QG,1 > 2.6 ×1019 GeV using the spectral approach. For the case of quadratic perturbations, the limits obtained are E QG,2 > 8.5 ×1010 GeV using the temporal approach and E QG,2 > 7.8 ×1011 GeV using the spectral approach

TeV Emission of Galactic Plane Sources with HAWC and H.E.S.S.

The High Altitude Water Cherenkov (HAWC) observatory and the High Energy Stereoscopic System (H.E.S.S.) are two leading instruments in the ground-based very-high-energy γ-ray domain. HAWC employs the water Cherenkov detection (WCD) technique, while H.E.S.S. is an array of Imaging Atmospheric Cherenkov Telescopes (IACTs). The two facilities therefore differ in multiple aspects, including their observation strategy, the size of their field of view, and their angular resolution, leading to different analysis approaches. Until now, it has been unclear if the results of observations by both types of instruments are consistent: several of the recently discovered HAWC sources have been followed up by IACTs, resulting in a confirmed detection only in a minority of cases. With this paper, we go further and try to resolve the tensions between previous results by performing a new analysis of the H.E.S.S. Galactic plane survey data, applying an analysis technique comparable between H.E.S.S. and HAWC. Events above 1 TeV are selected for both data sets, the point-spread function of H.E.S.S. is broadened to approach that of HAWC, and a similar background estimation method is used. This is the first detailed comparison of the Galactic plane observed by both instruments. H.E.S.S. can confirm the γ-ray emission of four HAWC sources among seven previously undetected by IACTs, while the three others have measured fluxes below the sensitivity of the H.E.S.S. data set. Remaining differences in the overall γ-ray flux can be explained by the systematic uncertainties. Therefore, we confirm a consistent view of the γ-ray sky between WCD and IACT techniques